JP4176335B2 - Hot water supply device for bathtub - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water supply apparatus that supplies hot water from an electric water heater into a bathtub, and more particularly, to a hot water supply apparatus for a bathtub that has a function of preventing freezing of hot water supply piping.
[0002]
[Prior art]
Conventionally, most of the hot water supply to the bathtub is of a type that guides hot water from an electric water heater or the like into the bathroom and supplies the hot water from the faucet into the bathtub. A so-called automatic hot water filling system has been proposed in which the temperature and level of hot water are detected and hot water is automatically supplied based on the detected values to store an appropriate temperature and an appropriate amount of hot water in the bathtub (for example, Japanese Patent Laid-Open No. Hei 3- No. 148562 or JP-A-5-116889).
[0003]
[Problems to be solved by the invention]
By the way, according to the hot-water supply system for bathtubs of the above-described hot-water filling system, a hot water supply piping system is connected to a bath adapter attached to the side wall of the bathtub, and hot water is unilaterally supplied into the bathtub through the adapter by direct pressure. Therefore, if the hot water is filled in the severe cold season in winter and left to stand until the next morning, the hot water in the hot water supply pipe between the direct pressure hopper and the adapter may be cooled and frozen.
[0004]
Therefore, in order to prevent freezing, the hot water supply pipe near the adapter is wrapped with a thick heat insulating material or a tape-shaped anti-freezing heater is used to prevent freezing. However, it takes time and effort to install it. In addition, if an anti-freeze heater is wound, there is a risk of electric leakage or fire due to a failure of the heater.
[0005]
This invention is made | formed in view of such a situation, and it aims at providing the hot water supply apparatus for bathtubs which can prevent the hot water supply piping to a bathtub freezing.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, a hot water supply apparatus for a bathtub according to the invention described in claim 1 (hereinafter referred to as “the hot water supply apparatus for a bathtub of the present invention”) is connected from an electric water heater through a direct pressure hopper. In a hot water supply device for a bathtub that automatically fills a bathtub by remote control, the remote control device is provided with an anti-freezing operation mode. Each time, the electromagnetic open / close valve of the direct pressure hopper opens, and water or hot water is injected from the electric water heater side into the bathtub side by direct pressure, that is, without using a driving means such as a pump.
[0007]
[Action]
The direct pressure hopper provided in the hot water supply pipe or hot water supply pipe to the bathtub opens the electromagnetic open / close valve of the direct pressure hopper at regular intervals when the outside air temperature decreases, and water or hot water is directly applied from the electric water heater side to the bathtub. Therefore, the chilled water remaining in the hot water supply pipe and the direct pressure hopper is discharged to the bathtub side, and the hot water in the hot water supply pipe and the direct pressure hopper is not cooled and frozen. .
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic explanatory view showing an example of the present invention, FIG. 2 is a sectional view showing the structure of a direct pressure hopper, FIG. 3 is a plan view showing an example of a remote control device used in the present invention, and FIG. It is a figure explaining the switching state of an operation mode.
[0009]
In FIG. 1, 1 is an electric water heater, 2 is a direct pressure hopper, 3 is a bathtub, and a hot water supply pipe 4 is connected to a bath adapter 32 mounted on a side wall 31 of the bathtub 3 from the electric water heater 1 through the direct pressure hopper 2. It is connected. 8 is a remote control device (abbreviated as “main remote control”) disposed in the kitchen or dressing room, and 9 is a remote control device (“bathroom remote control”) disposed in the bathroom so that it can be operated during bathing. And is connected to a control device (not shown) in the electric water heater 1 by a signal communication line (not shown).
[0010]
The electric water heater 1 is provided with a lower heater 12 at a lower part of a hot water tank 11 made of a stainless steel can body and an upper heater 13 at an upper part, and is supplied from a water supply pipe 6 connected below the hot water tank 11. The water in the hot water storage tank 11 is heated using midnight power to store hot water.
[0011]
In addition, a hot water outlet pipe 7 is connected above the hot water tank 11, and the hot water outlet pipe 7 branches off in the middle, and an electric mixing valve 41 of the circuit system of the hot water supply pipe 4 to the bathtub 3. Each is connected to an electric mixing valve 51 of the circuit system of the hot water supply pipe 5 to the shower 71.
[0012]
The direct pressure hopper 2 prevents water or hot water on the bathtub 3 side from flowing back to the water heater side. As shown in FIG. 2, an electromagnetic on-off valve 21 is provided on the water or hot water inlet side, and 2 on the outlet side. The check valves 22 and 22 are arranged in series, a negative pressure valve 23 is provided in a portion communicating with the inlet side, and in a pipe line between the electromagnetic on-off valve 21 and the check valve 22. Has a built-in flow sensor 24.
The direct pressure hopper 2 is provided with an electric mixing valve 41 on the entrance side, and a check valve 22 on the exit side is connected to the hot water supply pipe 4 to the bathtub.
[0013]
The bathtub 3 has an attachment hole 33 having a predetermined size so that the adapter 32 can be attached to the side surface 31, and the adapter 32 is attached to the attachment hole 33.
[0014]
As shown in FIG. 3, the main remote controller 8 includes an operation command / condition setting unit 81 and a monitor display unit 82. The operation command / condition setting unit 81 includes a reservation button 81a for making a hot water filling reservation, a bath automatic button 81b for making hot water of a set amount and temperature in a bathtub, and a [hour] button 81c for setting time. , A [minute] button 81d, a volume button 81e for adjusting sound, and the like are provided to set an operation command and an operation condition.
[0015]
The monitor display unit 82 is provided with a time display monitor 82a and a temperature display monitor 82b. When making a hot water reservation, the reservation button 81a and the time setting [hour] button 81b and [minute] button 81d are used. When set, the reserved time is displayed on the time display monitor 82a, and when setting the hot water temperature, the hot water temperature increase / decrease buttons 81f and 81g are pressed while the [minute] button 81c is pressed, and the temperature display monitor 82b is pressed. The temperature is displayed.
[0016]
When the volume button 81e is pressed while the time setting [minute] button 81d is being pressed, the freeze prevention operation mode is displayed on the time display monitor 82a. For example, as shown in FIG. 4, the current time is displayed as 8:30 pm on the time display monitor 82a, but when the minute button 81d is pressed and the volume button 81e is pressed, the operation mode is displayed as 1. When the volume button 81e is repeatedly pressed, the operation mode is sequentially changed from 2 → 0 → 1 → 2 → 0.
After a while, it is set to the displayed operation mode, and after confirming the setting, it waits for a while to change to the current time display. Unless the setting of the operation mode is changed, the operation mode is effectively operated as it is.
[0017]
The displayed operation mode [1] is a standard anti-freezing operation mode, and water is injected into the bathtub side when the outside air temperature decreases, and the operation mode [2] is a freezing operation mode in a cold region and the outside air temperature decreases. Then, hot water is poured into the bathtub, and the operation mode [0] is a mode in which the freeze prevention operation is not performed.
[0018]
As operating conditions for the freeze prevention operation, for example, the fact that the outside air temperature is 5 ° C. or less is detected by a temperature sensor installed outdoors, and the operation mode [1] or [2] is selected. In other words, the freeze prevention operation is stopped during automatic hot water filling.
[0019]
In addition, in the freeze prevention operation, it is possible to set the monitor mode such as setting of one injection amount of water or hot water, setting of injection interval time, setting of hot water temperature, and the like.
[0020]
Next, the freezing operation method of the embodiment of the present invention will be described.
Usually, a hot water supply device for a bathtub has a hot water supply temperature and a bathing time (reservation of hot water filling) set before bathing, and the hot water supply temperature is set by inputting the hot water supply temperature increase button 81f or the decrease button 81c and setting the hot water supply temperature 34 ° C. And displayed on the temperature display monitor 82b of the monitor display unit 82. When making a hot water reservation, press the reservation button 81a and set the time with the [hour] button 81c and the [minute] button 81d. The reservation time is displayed on the time display monitor 82a, confirmed and confirmed. .
[0021]
Switch to anti-freeze operation when entering the winter season from the beginning of autumn. In this case, press the volume button 81e while pressing the [minute] button 81d of the main remote control 8 to display the operation mode [1] or [2] on the time display monitor 82a, and select and confirm one of the operation modes. To do.
[0022]
Before bathing, the water in the hot water tank 11 is boiled by the lower heater 12 by midnight power. When the automatic bath button 81b is pressed, the hot water in the hot water storage tank 11 is supplied to the hot water discharge pipe 7 and is mixed with the low-temperature tap water supplied from the water supply pipe 6 by the electric mixing valve 41 to set the hot water temperature. It is supplied to the bathtub 3 through the pressure hopper 2 and automatically filled with hot water.
[0023]
After bathing, the remaining hot water in the bathtub 3 is left as it is, or the hot water in the pipes of the hot water supply pipe 4 and the direct pressure hopper 2 is left. Remaining. The remaining hot water in the piping path is cooled to become water, but when the outside air temperature becomes 5 ° C. or less in the severe cold season, the electromagnetic on-off valve 21 in the direct pressure hopper 2 opens, and the hot water on the hot water storage tank 11 side is kept in the bathtub for a certain time. The remaining hot water in the piping path is discharged to the bathtub side. Therefore, the remaining hot water in the piping path is replaced with new hot water from the hot water storage tank 11 and is not frozen.
[0024]
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific embodiment is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.
[0025]
For example, the freeze prevention operation mode may be provided in the bathroom remote control 9 to be operable. In addition, switching of the freeze prevention operation mode is performed using both the [minute] button 81d and the volume button 81e for setting the time, but a dedicated button may be provided.
[0026]
【The invention's effect】
As described above, according to the hot water supply device for a bathtub of the present invention, in a hot water supply device for a bathtub that automatically fills the bathtub by remote control from an electric water heater through a direct pressure hopper, the remote control device is frozen. By selecting an operation mode for preventing freezing by selecting an operation mode for preventing freezing, the electromagnetic on-off valve of the direct pressure hopper opens at regular intervals when the outside air temperature decreases, and water or hot water is supplied depending on the selection of the operation mode. Since it was injected from the electric water heater side into the bathtub side by direct pressure, the cooled water remaining in the hot water supply piping and direct pressure hopper is discharged to the bathtub side before freezing, and the hot water supply piping and direct pressure hopper piping The hot water in the path does not freeze and freezes, and freezing damage to hot water supply pipes and direct pressure hoppers can be prevented with water in the standard, and with cold water in cold regions .
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an example of a hot water supply apparatus for bathtubs according to the present invention.
FIG. 2 is a cross-sectional view showing the structure of a direct pressure hopper used in the present invention.
FIG. 3 is a plan view showing an example of a remote control device (remote controller) used in the present invention.
FIG. 4 is a diagram illustrating a state where a display monitor is displayed when the freeze prevention operation mode is switched by the remote controller.
[Explanation of symbols]
1 Water heater (electric water heater)
DESCRIPTION OF SYMBOLS 11 Hot water storage tank 2 Direct pressure hopper 21 Electromagnetic switching valve 22 Check valve 3 Bathtub 31 Side wall 32 Bath adapter 4 Hot water supply piping 6 Water supply piping 8, 9 Remote control device

Claims (1)

In a hot water supply device for a bathtub that automatically fills a bathtub by remote control from an electric water heater through a direct pressure hopper, the remote control device has an anti-freeze operation mode, and selects an anti-freeze operation mode. Therefore, when the outside air temperature drops, the solenoid valve of the direct pressure hopper opens at regular intervals, and when the standard freeze prevention operation mode is selected as the operation mode, water is selected, and the freeze prevention operation mode in the cold region is selected. In such a case, a hot water supply apparatus for a bathtub is characterized in that hot water is poured into the bathtub side by direct pressure from the electric water heater side.

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